Two words: In-laws; for both the bride and groom. As you plan to tie the knot and share your entire lives with one another, keep in mind that your families will be intertwining, which means you both will be having a new set of parents (sometimes two new sets)! InsideWeddings gave great advice on how to approach and include your parents and new in-laws up to big day!
Reaching each other: Woohoo! You’ve announced your engagement to your families and friends, but now what? Traditionally, the groom’s mother would call the bride’s family to arrange a get together and celebrate. Nowadays, your announcement is much more important that who does what; you’re getting married! So it could be the groom’s family, the bride’s family, or as a couple you and your groom can invite both side’s of the family to a gathering where everyone can meet, congratulate, and welcome you and yours to the family!

Money Matters: Financials are always a very personal and sensitive subject, so proceed with caution. Traditionally the bride’s parents paid for majority if not all of the day of wedding day arrangements and the décor as well as the engagement party. Traditionally the groom’s parent’s paid for everything that leads to the wedding day with a few additional décor costs "(the rehearsal dinner, the bride’s engagement and wedding rings, the marriage license, and officiant fee, and the flowers)."

Today, wedding expenses and finances are divided up in any way that best fits everyone’s budget. It important though to give everyone notice prior to discussing the finances of your wedding. As the bride, who wants only the best for your big day, keep in mind that they are supporting you and you may need to compromise with some of their wishes. Never expect someone to financially support your big day, be grateful for those who can and those who can't, either way you will be with the ones you love.

Lines of Communication: After your parents meet your future in-laws, encourage them to communicate directly with one another! This will make planning and coordinating with both sides of the family much more simple and fewer questions for you to answer!

Proper Attire: Your mom and mother in law will of course want to look fabulous on your big day. Traditionally the mother of the groom will ask the mother of the bride what she plans to wear, giving her the option to choose first. Regardless, your mothers should wear their personal preferences; but colors and styles that complement one another, and the wedding colors are always a plus!

Roles on the Big Day: On the day of the wedding, your parent's and the groom's parents should act as hosts throughout the day. They should all be included within the procession at the ceremony and greet guests at the reception. Your parents and in laws should also prepare to give a toast as well (usually father of the groom at the rehearsal dinner and father of the bride at the reception). This will be a very happy day for them as well, so be sure they enjoy, have some bubbly, and celebrate with all the guests.